Bulkhead structure



J. GERRITSON AND W. L. RIECK.

BULKHEAD STRUCTURE.

APPLICATION FILED DEC-6. 1919.

Patented Aug. 24, 1920.

2 SHEETS-SHEET 1.

J. GERRITSON AND W. L. RIECK.

BULKHEAD STRUCTURE.

APPLICATION FILED DEC. 6. 1919.

1,350,603. Patented Aug. 24, 1920.

2 SHEETS-SHEET 2.

ammwtozik WZZZz'am/Z. B21903.

I 7 flame/(3 Ucob Gerrz'iwm UNITED STATES PATENT OFFICE.

JACOB GERRITSON AND WILLIAM L. RIECK, 0F KANKAKEE, ILLINOIS.

BULKHEAD STRUCTURE.

Specification of Letters Patent.

Patented Aug. 24, 1920.

Application filed December 6, 1919. Serial No. 343,059.

7 To all whom it may concern:

Be it known that we, JACOB GERRITSON and WILLIAM L. RmcK, citizens of the United States, residing at Kankakee, in the county of Kankakee and State of Illinois,

have invented certain new and useful Ima simple, but efi'ective,-expedient for cover ing the notches or incuts .in the lower edge of a bulkhead that is utilized in pouring or otherwise forming a floor-slab. In the usual practice, a wooden bulkhead is disposed upon a floor-support or the like, this bulkhead being provided with a series of notches or incuts at its lower edge through which project the reinforcing bars, rods or wires that are eventually embedded in the cement. These notches are necessarily of considerably larger dimensions than the diametral dimensions of the rods, in consequence of which a space of some area is formed around the reinforcement rods; and, through such spaces the poured concrete oozes. into the space where the next floorslab is to be poured. In consequence, a considerable amount of cement; of the richest and most desirable part of the mix, is wasted; and, moreover, by reason of the fact that this cement which oozes through these spaces sets, it is difficult to remove it; and, besides, the portion of the slabat this point is much weaker and, whenthe bulkhead is removed, the concrete discloses a honey-comb effect. Still, again, if the con crete which works through the bulkhead is notthoroughly removed, there is danger that the next slab that is poured will be weaker because of the fact that the cement dries and sets and will not properly bond with the freshly-poured slab.

The device which we propose is designed to preclude the objections pointed out; and, to this end, in addition to providing a bulkv head of considerable strength and rigidity, we combine therewith a series of notch-cow ering stops for preventing the cement from running through the notches, these stops being readily located in juxtaposition to the rod-receiving notches in the bulkhead prel1m1nary to the-pouring of the ccmcntltious mass.

VViththis and other objects in view, the.

invention resides in the construction, in the aggroupment of certain components which constitute this construction, and in certain essential details thereof, all as will more fully hereinafter appear.

In order that the invention may more readily be comprehended, we have revealed the same in the accompanying drawings, these being, however, merely illustrative of a preferred and practical embodiment of the invention; and we desire it to be understood that the invention is susceptible of a wide .range of variation and modification from the illustrated embodiment without departing from the spirit of the invention or sac rificing any of its salient features or underlying principles.

In these drawings:

Figure 1 is a fragmentary view in perspective of the components required for forming a concrete slab, together with a preferred form of our invention aggrouped therewith;

Fig. 2 is a view in frontelevation of the cement-stop in the form in which we prefer to make it;

Fig. 3 is a similar view of a modified form of stop;

Fig. 4: is a fragmentary view in sectionalelevation showing the stop in position to cover a bulkhead notch and with a mass of cement formed against the same;

Fig. 5 is a similar view, but with a portion of the cement broken away to more clearly show the stop in contact with a bulkhead;

Fig. 6 is a fragmentary view in verticalsection showing a bulkhead with our improved stop juxtaposed thereto and with a mass of cement set against the bulkhead and the stop and embedded reinforcing wires; and

Fig. 7 is a view similar to Fig. 6, but with our stop omitted and, thus, disclosing the efi'cct of the cement oozing through the bulkhead notch.

Beferring to these drawings, it will be observed that the reference-numeral 1 designates, generally, a floor of slabforming boards sustained by beams or supports 2 for the falsework construction.

Upstanding from the floor 1. is a bulkhead designated, generally, 3 and comprising uprights 4 and boards 5, 6 and 7. The uprights .are held rigid by an angular brace 8 comprising a bulkhead-cleat 4, a bulkhead-block 8 and a bulkhead brace-member 8, respectively, secured to the floor 1 and also'to the uprights.

The base of the bulkhead, and particularly the part'thereof formed by the board 7, is provided with a plurality .of incuts or notches 9 which: are, preferably and .as

shown, rectangular in form. Extending through these notches are a series of reinforcing bars, wires or rods 10; and in conjunction with these is a series of transverse reinforcing bars, wires or rods 11.

alt has been the usual practice, heretofore,

to pour the cement onto-the support, like the floor 1, and against a bulkhead of a type somewhat like that herein-marked S. lVhen this was done, a'portion of the cement flowed the flow of the 'cementitious mass, as in the manner illustrated in Fig. 6.- To'this end, we have designed a stop here n designated, generally, by the reference-numeral 18. This comprises a member, preferably square in form, relatively thin cross-section, and desirably made of a flexible material such as paper or the like, which has no characteristic of" undesirably affecting the cement while setting or hardening and thereby effecting a cracking of the same or otherwise undesirably affecting it. These stops 13 must be capable of being located in juXtaposi-- tion to the .openings'fi) after the rods or wires have been projected therethrough; and it is regarded as important to have these stops firmly embrace the rods 10, first in order that they, themselves, may be held in proper relation to the bulkhead and to the floor 1 1 while the cement or concrete-is being poured and while setting; and, also, in order to aid in the support of the rods 10 in relation to the floor 1. To this end, the members 18 are provided with an aperture 14. In the type-of stop shown in Figs. 1, 2, 5 and 6,

the aperture 14 is formed by providing the central portion of the member with aseries of radiating slits orcuts 15 and by bending or otherwise forming the points 16 out- 7 wardly, the formation thus produced resulting in a counter-sink or depression 17. Ex-

tending froni'one edge of the member 13 to the aperture 14 is a slit or cut 18, and, in

this instance, it preferably constitutes an extension "of one of the slits 15.

The member 13 is, preferably and as shown, divided into a body-portion 19. and

2 2,. so that the portion 20 may be bent at right angles to the plane. of the body portion 19 and thereby provide a base-portion 20, as shown in Figs. 1, 4, 5 and'6, and which base-portion engages the upper surface of the floor 1 at right angles to the face of the bulkhead 3. i r V The purpose of providing the stOp'with a slit 18 is to permit the same to be positioned about the: reinforcing rod or bar 10; and, to that end, the stop is, as already stated, made of flexible material in order that it may be placed in position, the slit 18 permitting the two proximate sections 24 and 25, at opposite sides of the slit 18, to be bent away from each other temporarily. Another feature which characterizes the provision of the slits 14 is that the pointsformed by these radiating slits-when thereinforcing rod extends through the aperture are caused to project outwardly and away fromthe face ofuthe bulkhead'so that, when the concrete is poured against the stop, the weight and pressure of the cement will tend to tighten and push the points more tightly against the rod.

The slits 15 permit this movement of the sections 24 and 25 without tearing or injuring the portions of'the member about the central aperture 14.

In Fig. 3, a modified form of stop is shown. In this instance, the stop-member 26 is provided with a slit or out 27 extending from oneedge thereof to a central aperture 28 of approximately the same diameter as that of the reinforcing bar rodior wire which is to be positioned therein. To provide against the'tearing of the member while the rod is being placed in position in the aperture 28, a slit or out 29 of irregnlar form isprovided which extends from. the aperture 28 into the body of the member but falls short of the edge of the member.

'In actual practice, this stop has been found to be exceedingly" effective for the purpose for which it is designed. It is a device which may be economically manufactured, being formed in a cutting machine and, wl en in "use, effectually blocks the cement or concrete from flowing beyond the bulkhead, which, as shown in Fig. 7 ,would otherwise occur. 7

' What we claim is: a g

1. 'An instrumentality for utilization in concrete construction including a relatively thin sheet member-provided with a rodreceiving aperture and a slit extending from the edge of the memb'erto the aperture.

2. An instrumentality for utilization in concrete bulkhead construction including a relatively thin. sheet member provided with a central rod-receiving aperture and with a slit which-extends from one edge of the member to the aperture and permitsthe insertion of a rod in the aperture.

3. An instrumentality for utilization in concrete bulkhead construction including a relatively thin sheet member provided with a rod-receiving aperture and with a slit which extends from one edge of the member to the aperture; the member being flexible to permit the sections of it adjacent the slit to be shifted relatively for permitting the insertion of a rod in the aperture.

4. An instrumentality for utilization in concrete bulkhead construction including a flexible member provided with a rod-receiving aperture and with a slit which extends from one edge of the member to the aperture, there being a plurality of slits extending from the edge of the aperture but falling short of the edge of the member.

5. As an article of manufacture, a stop for concrete bulkhead construction comprising a member provided with a weakening line adjacent one edge thereof and having a cent 'al aperture, a slit extending from one edge of the member to the aperture, a floorengaging sect-ion bendable at the weakening line and angularly to the plane of the main portion of the stop, and a slitradiating from the aperture but not extending to the edge of the member.

6. As an article of manufacture, a concrete stop for bulkhead construction, relatively thin in cross-section, flexible, and comprising a member including a body-portion and a bendable portion adjacent one edge thereof, the body-portion being provided with a central rod-encompassing aperture, and a series of slits radiating from the aperture, one of the slits extending to the edge of the member.

7. A bulkhead structure comprising an upstanding bulkhead provided with a series of notches and a cement-stop for each of the notches comprising a relatively thin sheet member of. larger dimensions than its proximate notch and having a rod-receiving aperture, and an angular slit extending from an edge of the member to the aperture.

8. A. bulkhead structure comprising an upstanding bulkhead provided with a series of notches and a cement-stop for each of the notches comprising a relatively thin sheet member of larger dimensions than its proximate notch and having a rod-receiving aperture, an angular slit extending from an edge of the member to the aperture and positionable over the notch.

9; A bulkhead structure comprising an upstanding bulkhead provided with a series of notches and a cement-stop for each of the notches comprising a relatively thin sheet member of larger dimensions than its proximate notch and having a rod-receiving aperture, an angular slit extending from an edge of the member to the aperture, po-

'1 rods extends and a slit sitionable over the notch, and relatively thin.

10. A bulkhead structure comprising an upstanding bulkhead provided with a series notches and a cement-stop for each of e notches comprising a member of larger dimensions than its proximate notch and be ing a rod-receiving aperture and procl with a weakening line adjacent one edge thereof, an angular slit extending from an edge of the member to the aperture, po sitionable over the notch, relatively thin, and having a floor-engaging portion at one sid of the weakening line to permit the ening-portion to be angulated to the bodyon of the stop. 11. A bulkhead structure comprising a support or floor, a bulkhead upstanding therefrom and provided at its lower edge with a series of notches, reinforcing rods, bars or wires extending through said notche and a cement stop overlying each notch and of greater dimensions than the notch and having a central aperture through which one of the rods extends and a slit extendi from an edge of the stop to the aperture whereby the positioning of the rod in the a, erture is far-ilitated.

12. A bulkhead structure comprising a support or floor, a bulkhead upstanding therefrom and provided at its lower edge with a series of notches, reinforcing rods extending through said notches, and a cement stop overlying each notch and of g eater dimensions than the notch and hav ing a :entral aperture through which one of the rods extends and a slit extending from an e of the stop to the aperture whereby ti e positioning of the rod in the aperture is facilitated. and a brace therefor.

13. El bulkhead structure comprising a support or floor, a bulkhead upstanding therefrom and provided at its lower edge with a series of notches, reinforcing rods ex tending through said notches, and a cement stop ovenflyiug each notch and oi greater dimensions than the notch and having a central aperture throu h which one of the extending from an edge of the stop to the aperture whereby the positioning of the rod in the aperture is facilitated, and braces therefor sustained by the support.

14:. ii bulkhead structure comprising a support or floor, a bulkhead upstanding therefrom and, provided at its lower edge with series of notches, reinforcing rods xtcnding through said notches, and a cenu stop overlying each notch and of greater dimensions than the notch and having a central aperture through which one of the wires extends and a slit extending from an edge of the stop to the aperture whereby the positioning of the rod in the aperture is facilitated, and braces therefor sustained bythe support; and the stop being provided with a weakening line adjacent one edge and thereat bent to provide a floor-engaging section.-

7 15. A bulkhead structure including a cement-supporting floor, an elongated bulkhead upstanding therefrom and provided at its'lower edge with a series of incutsor notches a series of reinforcing rods positioned above the floor and extending through the notches, and a series of cement stops juxtaposed to one face of the bulkhead,

latter having a slitextending from the aperture to an edge of the stop.

16. An instrumentality for utilization in concreteibulkhead construction including a relatively thin sheet-member provided adjacent its central portion with a series of radiating slits and having an elongated slit extending from one edge of the member to approximately its said central portion.

In testimony whereof we affix our signatures in presence of two witnesses.

JACOB GERRITSON, WILLIAM L. RIEOK.

A. WV. FIELD. 

